]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: evsci - System Control Interrupt configuration and | |
4 | * legacy to ACPI mode state transition functions | |
5 | * | |
6 | ******************************************************************************/ | |
7 | ||
8 | /* | |
9 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
10 | * All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/acevents.h> | |
47 | ||
48 | ||
49 | #define _COMPONENT ACPI_EVENTS | |
50 | ACPI_MODULE_NAME ("evsci") | |
51 | ||
52 | ||
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_ev_sci_xrupt_handler | |
56 | * | |
57 | * PARAMETERS: Context - Calling Context | |
58 | * | |
59 | * RETURN: Status code indicates whether interrupt was handled. | |
60 | * | |
61 | * DESCRIPTION: Interrupt handler that will figure out what function or | |
62 | * control method to call to deal with a SCI. | |
63 | * | |
64 | ******************************************************************************/ | |
65 | ||
66 | static u32 ACPI_SYSTEM_XFACE | |
67 | acpi_ev_sci_xrupt_handler ( | |
68 | void *context) | |
69 | { | |
70 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; | |
71 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
72 | ||
73 | ||
74 | ACPI_FUNCTION_TRACE("ev_sci_xrupt_handler"); | |
75 | ||
76 | ||
77 | /* | |
78 | * We are guaranteed by the ACPI CA initialization/shutdown code that | |
79 | * if this interrupt handler is installed, ACPI is enabled. | |
80 | */ | |
81 | ||
82 | /* | |
83 | * Fixed Events: | |
84 | * Check for and dispatch any Fixed Events that have occurred | |
85 | */ | |
86 | interrupt_handled |= acpi_ev_fixed_event_detect (); | |
87 | ||
88 | /* | |
89 | * General Purpose Events: | |
90 | * Check for and dispatch any GPEs that have occurred | |
91 | */ | |
92 | interrupt_handled |= acpi_ev_gpe_detect (gpe_xrupt_list); | |
93 | ||
94 | return_VALUE (interrupt_handled); | |
95 | } | |
96 | ||
97 | ||
98 | /******************************************************************************* | |
99 | * | |
100 | * FUNCTION: acpi_ev_gpe_xrupt_handler | |
101 | * | |
102 | * PARAMETERS: Context - Calling Context | |
103 | * | |
104 | * RETURN: Status code indicates whether interrupt was handled. | |
105 | * | |
106 | * DESCRIPTION: Handler for GPE Block Device interrupts | |
107 | * | |
108 | ******************************************************************************/ | |
109 | ||
110 | u32 ACPI_SYSTEM_XFACE | |
111 | acpi_ev_gpe_xrupt_handler ( | |
112 | void *context) | |
113 | { | |
114 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; | |
115 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
116 | ||
117 | ||
118 | ACPI_FUNCTION_TRACE("ev_gpe_xrupt_handler"); | |
119 | ||
120 | ||
121 | /* | |
122 | * We are guaranteed by the ACPI CA initialization/shutdown code that | |
123 | * if this interrupt handler is installed, ACPI is enabled. | |
124 | */ | |
125 | ||
126 | /* | |
127 | * GPEs: | |
128 | * Check for and dispatch any GPEs that have occurred | |
129 | */ | |
130 | interrupt_handled |= acpi_ev_gpe_detect (gpe_xrupt_list); | |
131 | ||
132 | return_VALUE (interrupt_handled); | |
133 | } | |
134 | ||
135 | ||
136 | /****************************************************************************** | |
137 | * | |
138 | * FUNCTION: acpi_ev_install_sci_handler | |
139 | * | |
140 | * PARAMETERS: none | |
141 | * | |
142 | * RETURN: Status | |
143 | * | |
144 | * DESCRIPTION: Installs SCI handler. | |
145 | * | |
146 | ******************************************************************************/ | |
147 | ||
148 | u32 | |
149 | acpi_ev_install_sci_handler (void) | |
150 | { | |
151 | u32 status = AE_OK; | |
152 | ||
153 | ||
154 | ACPI_FUNCTION_TRACE ("ev_install_sci_handler"); | |
155 | ||
156 | ||
157 | status = acpi_os_install_interrupt_handler ((u32) acpi_gbl_FADT->sci_int, | |
158 | acpi_ev_sci_xrupt_handler, acpi_gbl_gpe_xrupt_list_head); | |
159 | return_ACPI_STATUS (status); | |
160 | } | |
161 | ||
162 | ||
163 | /****************************************************************************** | |
164 | * | |
165 | * FUNCTION: acpi_ev_remove_sci_handler | |
166 | * | |
167 | * PARAMETERS: none | |
168 | * | |
169 | * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not | |
170 | * installed to begin with | |
171 | * | |
172 | * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be | |
173 | * taken. | |
174 | * | |
175 | * Note: It doesn't seem important to disable all events or set the event | |
176 | * enable registers to their original values. The OS should disable | |
177 | * the SCI interrupt level when the handler is removed, so no more | |
178 | * events will come in. | |
179 | * | |
180 | ******************************************************************************/ | |
181 | ||
182 | acpi_status | |
183 | acpi_ev_remove_sci_handler (void) | |
184 | { | |
185 | acpi_status status; | |
186 | ||
187 | ||
188 | ACPI_FUNCTION_TRACE ("ev_remove_sci_handler"); | |
189 | ||
190 | ||
191 | /* Just let the OS remove the handler and disable the level */ | |
192 | ||
193 | status = acpi_os_remove_interrupt_handler ((u32) acpi_gbl_FADT->sci_int, | |
194 | acpi_ev_sci_xrupt_handler); | |
195 | ||
196 | return_ACPI_STATUS (status); | |
197 | } | |
198 | ||
199 |